Sprinkler head for fire-extinguishing systems



June 17, 1924. 1,498,139

D. WILLIAMS SPRINKLER HEAD FOR FIRE EXTINGUISHING SYSTEMS Filed Feb. 14, 1923 Zlwovntoz 17. Williams Patented June 17, 1924.

III-AVID WILL-rams or Andreas, Louisiana.

SPRINKLER HEAD FOR FIRE-EXTINGUISHING. SYSTEMS.

Application filed February 1 1, 1923. Serial No. 618,994.

To all whom it may concern:

Be it known that 1, DAVID \VILnrAMs, a citizen of the United States, residing at Algiers, in the parish of Orleans and State of Louisiana, have invented certainnew and useful Improvements in SprinklerHeads for Fire-Extinguishing Systems, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in sprinkler heads forfire extinguishing systems and more particularly to the construction of thefusible link usually employed in conjunction with such sprinklers.

An important object of the invention is to provide a sprinkler head, the link of which is under tension andthe parts of which will accordingly separate rapidly when the fusible section thereof is destroyed by heat.

A further object of the invention is to provide a fusible link which is constructed of two pieces of metal exactly similar. in construction and which accordingly may be very cheaply produced.

A still further object of the invention is to provide a sprinkler head the parts of which are reduced to a minimum.

These and other objects I attain by the construction and arrangement shown in the accompanying drawings wherein for the.

purpose of illustration is shown a preferred embodiment of my invention and wherein like reference characters designate like parts throughout.

In the drawings I Figure 1 is a vi'ew' partially in sectionjof a sprinkler head embodying a fusible link constructed in accordance with my invention;

Figure 2 is a perspective of the assembled link;

Figures 3, 4 and 5 are perspective views of the parts of the links when separated;

and

Figures 6 and 7 are views of the blanks from which the sections shown in Figures 3 and 5 are constructed.

Referring now more particularly to the drawings, the numeral 10 designates a nipple adapted to be inserted in the sprinkler pipe and which is formed at its upper end with a valve seat 11 which coacts with a valve 12 to close the outlet of fluid through the nipple. The nipple is provided at opposite sides thereof with upwardly extending arms 13 which are joined at their upper ends by a bridge piece 14 overhanging the valve 12. i

This bridge piece has a threaded central aperture 15 through which is directed a threaded member 16, the upper. end of which is adapted for engagementby a wrench, as

indicated at 17,;1nd the lower end of which is provided with a socket for engaging the upper end ofa fusible link 18, the lower end of which engages against the valve to hold the same in position onthe seat.

spray. 1

The fusible link 18 is a the ambit trapezoid having a notch 20 formed in the basethereof. The link as ail-nit may be dividedinto two sections, a fuse section 21 and a stem section 22, which are diiferentiated by the fact that the fuse section ha th'e parts thereof connected by a layer of fusible metal 23 whereas the stem section 22 contains no fusible metal. The s'tem section 22 is split from ,thebjase of the not'chf2O n about itspoint of juncture about the fuse section 21,-,as indicated at 24. I v

The fuse section is composed of two flat sheets of metal 25 a-nd 26 joined by (the fusible layer 23 above noted, each .ofthe sheets 25 and 26- being connected with a corresponding stem section 25 o-r26 into which the .stem seat of the trapezoid is divided by the split2a above mentioned. The sections 25 and 26 are of ath'iokness equal to the combined thickness of the shee'ts25 and 26 and interposed connecting layer of fusible material 23. The sheets 25 and 26 are correspondingly curved, as at 27, so that they interfit, this curvature being in a direction transverse to the line of movement of the sheets 25 and 26'induced by applying pressure to the corners 28 of the stem side of the link when the fusible layer 23 is removed by heat or otherwise. These sections being curved and interfitting, will by such movement be caused to separate and it will be obvious that such separation will remove the supporting coaction between separate sections of the link causing the same to fly apart under the pressure applied thereto and to permit the valve 12 to elevate from its seat under the pressure of water from the fire line F. The sections from which the link is formed may be produced in any desired manner. The sheets valve comprising a sectlon and a stem section, the stem section ing constructed in similar parts,

25 and 26 are provided with an extension E which is composed of three sections S, S and S each section corresponding in shape to a part 25* or 26 of the stem side 22, the sections having corresponding parts thereof joined and being adapted to be folded at the juncture of these corresponding points, as indicated by the dotted lines, to form a structure such as shown in Figure 2. Be-

the link may be readily produced and assembled, thereby reducing the cost thereof to a minimum. It will be obvious that by adjusting the part 16 toward the cap,,a desired tension. may be placed upon the sections of the link and that upon release of these sectionsby fusing of the fusible layer, these sections will move in opposite directions to release the valve. It will furthermore be obvious that the construction as hereinbefore set forth is capable of some change and modification Without materially departing from the spirit of my invention and accordingly do not limit myself to such specific structure except as hereinafter claimed.

I claim i V f 1. iA fusible link for the sprinkler heads of sprinkler systems having a closure valve and a part adjustable toward the closure member having a fuse being divided intermediate its length into two parts constructed to rock upon one another when pressure is applied to the ends thereof, the fuse section comprising a pair of sheets, each sheet being provided with an extension forming one section of the stem section, and a fusible connection between said sheets.

2. A fusible link forthe sprinkler heads of springler systems having a'closure valve and a part adjustable toward the closure valve, comprising a member having a fuse section anda stem section, the stem section being divided intermediate its length into 7 .two parts constructed to rock upon one another when pressure is applied to the ends thereof, the fuse section comprising a pair of sheets, each sheet being connected to one sect-ion of the stem section, and a fusible connection between said sheets, said sheets being correspondingly curved in a direction transverse to the direction of movement thereof upon rocking of the stem section under pressure applied thereto when the sheets are released whereby upon fusing of the fuse section the stem sections are caused to rotate upon one another to assist in the separation thereof.

3. A fusible link for the sprinkler heads of sprinkler systems having a closure valve and a part adjustable toward the closure valve comprising a fuse section and a stem section, the stem section being adapted for engagement with the closure valve and said part at its upper and lower faces adjacent the end edge thereof, said end edge of the I stem section being providedcentrally with a notch and being split at the base of the notch in two sections, the fuse section comprising a pair of sheets fusibly connected to one anotherand each rigidly connected with one of said stem sections.

4E. A fusible link for the sprinkler heads of sprinkler systems having a closure valve and a part adjustable toward the closure valve, comprising a fuse sect-ion and a stem section, the stem section being adapted for engagement with the closure valve and said part at its upper and lower faces adjacent the end edge thereof, said end edge ofthe stem section being provided with a notch, the stem section being split at the base of the notch to form thesame in two sections, the fuse section comprising a pair .of sheets fusibly connected to one another and each having. an extension formed to provide one section of said stem section. i

In testimony whereof I hereunto afiixrmy signature.

DAVID WILLIAMS. 

